diff --git a/pika-build-config/lto.sh b/pika-build-config/lto.sh
index cc1bcfa1c..723581a6a 100644
--- a/pika-build-config/lto.sh
+++ b/pika-build-config/lto.sh
@@ -1,5 +1,5 @@
-export PIKA_PACKAGE_VERSION="13.1.0-3"
-export PIKA_PACKAGE_NAME="python-os-apply-config"
+export PIKA_PACKAGE_VERSION="5.5.0-3"
+export PIKA_PACKAGE_NAME="python-oslo.serialization"
 export PIKA_PACKAGE_PATCH=false
 export PIKA_REBUILD=false
 export PIKA_REBUILD_VERSION="b0"